Stalin set up new soviet high command -Stavka, which was the administrative headquarters to ensure centralized and efficient governing over the armed fighting.
He also promoted some officers to higher positions as he realised he could fight and lead the army alone.
He promoted officers and gave them freedom to run the battlefield.
Zhukov was one of the most successful Soviet commanders
He was respected by Stalin and survived the purges
His role as commander in the War helped lead toward victory